Grain Yield Stability of Rice Genotypes

Abstract

Stability analysis identifies the adaptation of a crop genotype in different environments. The objective of this study was to evaluate promising rice genotypes for yield stability at different mid-hill environments of Nepal. The multilocation trials were conducted in 2017 and 2018 at three locations viz Lumle, Kaski; Pakhribas, Dhankuta; and Kabre, Dolakha. Seven rice genotypes namely NR11115-B-B-31-3, NR11139-B-B-B-13-3, NR10676-B-5-3, NR11011-B-B-B-B-29, NR11105-B-B-27, 08FAN10, and Khumal-4 were evaluated in each location. The experiment was laid out in a randomized complete block design with three replications. The rice genotype NR10676-B-5-3 produced the highest grain yield (6.72 t/ha) among all genotypes. The growing environmental factors (climate and soil conditions) affect the grain yield performance of rice genotypes. The variation in climatic factors greatly contributed to the variation in grain yield. Polygon view of genotypic main effect plus genotype-by-environment interaction (GGE) biplot showed that the genotypes NR10676-B-53 and NR11105-B-B-27 were suitable for Lumle; NR11115-B-B-31-3 and NR11139-B-B-B-13-3 for Pakhribas; and 08FAN10 and NR11011-B-B-B-B-29 for Kabre. The GGE biplot showed that genotype NR10676-B-5-3 was stable hence it was near to the point of ideal genotype. This study suggests that NR10676-B-5-3 can be grown for higher grain yield production in mid-hills of Nepal.

Evaluation of growth and yield traits in rice genotypes using multivariate analysis

“…Significant diversity in agro-morphological traits was reported in rice genotypes by Worede et al. (2014) , Shrestha et al. (2020b) , and Shrestha et al.…”

“…There was also a lot of variation in grain production across the twelve coarse rice genotypes (Zahid et al, 2005). Significant diversity in agro-morphological traits was reported in rice genotypes by Worede et al (2014), Shrestha et al (2020b), andShrestha et al (2021).…”

Studies on Correlation and some Morphological, Yield and its Components Traits in some Rice Hybrids

“…Grain yield and other characters exhibited stability across the seasons since no significance of year × genotype interaction was detected and the differences among hybrids were apparent. Contrarily, Shrestha et al (2020) found significant interaction between genotypes and year in grain yield.…”

Comparative study on technical efficiency of mechanized and traditional rice farm in Nepal

“…Government of Nepal (GoN), Nepal Agricultural Research Council (NARC) has been playing a significant role to improve the rice productivity in the country. The current production is not sufficient to meet the demand of growing population and ensure food security in the country (Shrestha et al, 2020a;Shrestha et al, 2020b). However, the results have not been achieved satisfactory.…”